missing template information about castxml

[bradking]

The mangled attribute was always provided by gccxml. I've added the mangled attribute to CastXML in commit 0a10370. It is only on function and variable declarations, not on everything like gccxml did. Clang does not implement mangling for anything else because nothing else can be a link-time symbol. Furthermore, when simulating MS compilers the MS-style mangling is now used.

[bradking]

The demangled attribute was added by gccxml/gccxml@9bce3d5 for human reference but was not intended to provide template instantiation arguments in a structured way. It just so happened that the string in this attribute could be abused in many cases to extract template argument information (but not in general AFAIK).

The demangled attribute happened to be something that gccxml could provide because GCC's source came with a demangler. Clang provides no demangler in its source and provides no API to print declarations the same way they would appear after demangling. Therefore CastXML cannot easily provide the demangled attribute. Still, external tools that want to try to extract template information like this could use abi::__cxa_demangle and/or UnDecorateSymbolName themselves to get it from the mangled attribute.